We enjoy Edinburgh’s Royal Botanic Gardens. A beautifully manicured garden in the middle of a big city.
In their new visitor’s centre there is now an exhibit on Energy, Food, and the Environment. I could not help but notice from afar the poster about “Energy” which prominently displayed a windmill. Moving closer I saw the message which is apparently that “wind is best since it’s free!”.
By the same criteria all energy sources are free at the point it’s mined from the earth.
What’s so special about Wind being “free” compared to other sources of energy? I accept that as long as the sun shines we’re likely to have some amount of wind and hence “renewable” to the extent that the wind continues to blow. Further, I accept that other sources of energy may have limited quantities residing on earth, thus are not automatically “renewable”.
But what does “free” mean and why is this the feature of this poster? Are they trying to say that we can get something for nothing and it’s easy to do so?